ALTER SHARE

Applies to: Databricks SQL Databricks Runtime 10.4 LTS and above Unity Catalog only

Adds, alters or removes schemas, tables, materialized views, or views to or from the share. Renames a share. Transfers the ownership of a share to a new principal.

Permissions required:

• To update the share owner, you must be one of the following: a metastore admin, the owner of the share object, or a user with both the USE SHARE and SET SHARE PERMISSION privileges.
• To update the share name, you must be a metastore admin (or user with the CREATE_SHARE privilege) and share owner.
• To add tables or views, you must be the owner of the share object, have USE SCHEMA on the schema that contains the table or view, and the SELECT privilege on the table or view. You must maintain the SELECT privilege for as long as you want to share the table or view.
• To update any other share properties, you must be the owner.

Syntax

ALTER SHARE share_name
  { alter_add_materialized_view |
    REMOVE MATERIALIZED VIEW mat_view_name |
    alter_add_table |
    REMOVE TABLE table_name |
    alter_add_schema |
    REMOVE SCHEMA schema_name |
    alter_add_view |
    REMOVE VIEW view_name |
    alter_add_model |
    REMOVE MODEL model_name |
    RENAME TO to_share_name |
    [ SET ] OWNER TO principal }

alter_add_materialized_view
  { { ALTER | ADD } MATERIALIZED VIEW mat_view_name [ COMMENT comment ] [ AS mat_view_share_name ]

alter_add_table
  { { ALTER | ADD } [ TABLE ] table_name [ COMMENT comment ]
        [ PARTITION clause ] [ AS table_share_name ]
        [ WITH HISTORY | WITHOUT HISTORY ] }

alter_add_schema
  { { ALTER | ADD } SCHEMA schema_name [ COMMENT comment ]

alter_add_view
  { { ALTER | ADD } VIEW view_name [ COMMENT comment ] [ AS view_share_name ]

alter_add_model
  { { ALTER | ADD } VIEW model_name [ COMMENT comment ] [ AS model_share_name ]

note

WITH HISTORY | WITHOUT HISTORY is supported in Databricks Runtime 12.2 LTS and above. Databricks Runtime versions 11.1 through 12.0 require that you specify WITH CHANGE DATA FEED [ START VERSION version ] instead of WITH HISTORY. On Databricks SQL and Databricks Runtime 16.2 and above, WITH HISTORY is the default.

WITH CHANGE DATA FEED is deprecated.

Note also that if, in addition to doing time travel queries and streaming reads, you want your customers to be able to query a table's change data feed (CDF) using the table_changes() function, you must enable CDF on the table before you share it WITH HISTORY (or WITH CHANGE DATA FEED).

Parameters

• share_name

  The name of the share to be altered.

• alter_add_materialized_view

  Applies to: Databricks SQL Databricks Runtime 13.3 LTS and above

  Preview

  This feature is in Public Preview.

  Adds a materialized view to the share or modifies an existing shared materialized view. To run this statement, you must be the owner of the share and have SELECT privileges on the materialized view.

  • ADD MATERIALIZED VIEW mat_view_name

    Identifies the materialized view to be added. If the materialized view cannot be found, Databricks raises a TABLE_OR_VIEW_NOT_FOUND error.

  • ALTER MATERIALIZED VIEW mat_view_name

    Identifies the materialized view to be altered. If the materialized view is not already part of the share, Databricks raises an error.

  • COMMENT comment

    An optional STRING literal attached to the materialized view share as a comment.

  • AS mat_view_share_name

    Optionally exposes the materialized view under a different name. The name can be qualified with a schema name. If no mat_view_share_name is specified, the materialized view is known under its own name.

    If the shared name already exists, Databricks raises an error.

  • REMOVE MATERIALIZED VIEW mat_view_name

    Applies to: Databricks SQL Databricks Runtime 13.3 LTS and above

    Remove the materialized view identified by mat_view_name from the share. To run this statement, you must be the owner of the share.

  • alter_add_table

    Adds a table or partitions of a table to the share or modifies an existing shared table. To run this statement, you must be the owner of the share and have SELECT privilege on the table.

    • ADD [ TABLE ] table_name

      Identifies the table to be added. The table must not reside in Unity Catalog. If the table cannot be found Databricks raises a TABLE_OR_VIEW_NOT_FOUND error.

    • ALTER [ TABLE ] table_name

      Identifies the table to be altered. If the table is not already part of the share Databricks raises an error.

    • COMMENT comment

      An optional STRING literal attached to the table share as a comment.

    • PARTITION clause

      One or to more partitions of the table to be added. The partition keys must match the partitioning of the table and be associated with values. If no PARTITION clause is present ADD TABLE adds the entire table.

      To partition by reference to a recipient properties, use the syntax:

      PARTITION (column_name = CURRENT_RECIPIENT().<property-key>)

      Partitioning by reference to recipient properties Applies to: Databricks SQL Databricks Runtime 12.2 LTS and above.

    • AS table_share_name

      Optionally exposes the table under a different name. The name can be qualified with a database (schema) name. If no table_share_name is specified the table will be known under its own name.

    • WITH HISTORY or WITHOUT HISTORY

      Applies to: Databricks SQL Databricks Runtime 12.2 LTS and above.

      When WITH HISTORY is specified, share the table with full history, allowing recipients to perform time travel queries. The shared table can then be referenced using VERSION AS OF and TIMESTAMP AS OF.

      If, in addition to doing time travel queries and streaming reads, you want your customers to be able to query a table's change data feed (CDF) using the table_changes() function, you must enable CDF on the table before you share it WITH HISTORY.

      The default behavior on Databricks SQL and Databricks Runtime 16.2 and above is WITH HISTORY. On Databricks Runtime 16.1 and below, it is WITHOUT HISTORY.

  • REMOVE TABLE table_name

    Remove the table identified by table_name from the share. To run this statement, you must be the owner of the share.

  • alter_add_schema

    Applies to: Databricks SQL Databricks Runtime 13.3 LTS and above

    Adds a schema to the share or modifies an existing shared schema. To run this statement, you must be the owner of the share and the schema.

    • ADD SCHEMA schema_name

      Identifies the schema to be added. If the schema cannot be found, Databricks raises a SCHEMA_NOT_FOUND error.

    • ALTER SCHEMA schema_name

      Identifies the schema to be altered. If the schema is not already part of the share, Databricks raises an error.

    • COMMENT comment

      An optional STRING literal attached to the schema share as a comment.

  • REMOVE SCHEMA schema_name

    Remove the schema identified by schema_name from the share. To run this statement, you must be the owner of the share.

  • alter_add_view

    Applies to: Databricks SQL Databricks Runtime 13.3 LTS and above

    Adds a view to the share or modifies an existing shared view. To run this statement, you must be the owner of the share and have SELECT privilege on the view.

    • ADD VIEW view_name

      Identifies the view to be added. If the view cannot be found Databricks raises a TABLE_OR_VIEW_NOT_FOUND error.

    • ALTER VIEW view_name

      Identifies the view to be altered. If the view is not already part of the share Databricks raises an error.

    • COMMENT comment

      An optional STRING literal attached to the view share as a comment.

    • AS view_share_name

      Optionally exposes the view under a different name. The name can be qualified with a schema name. If no view_share_name is specified, the view is known under its own name.

      If the shared name already exists, Databricks raises an error.

  • REMOVE VIEW view_name

    Remove the view identified by view_name from the share. To run this statement, you must be the owner of the share.

  • alter_add_model

    Applies to: Databricks SQL Databricks Runtime 14.0 and above

    Adds a model to the share or modifies an existing shared model. To run this statement, you must be the owner of the share and have EXECUTE privilege on the model.

    • ADD MODEL model_name

      Identifies the model to be added. If the model cannot be found Databricks raises a RESOURCE_DOES_NOT_EXIST error.

    • ALTER MODEL model_name

      Identifies the model to be altered. If the model is not already part of the share Databricks raises an error.

    • COMMENT comment

      An optional STRING literal attached to the model share as a comment.

    • AS model_share_name

      Optionally exposes the model under a different name. The name can be qualified with a schema name. If no model_share_name is specified, the model is known under its own name.

      If the shared name already exists, Databricks raises an error.

  • REMOVE MODEL model_name

    Remove the model identified by model_name from the share. To run this statement, you must be the owner of the share.

  • RENAME TO to_share_name

    Applies to: Databricks SQL Databricks Runtime 11.3 LTS and above

    Renames the share. The name must be unique among all shares in the metastore. To run this statement, you must be the owner of the share and have CREATE SHARE privilege on the metastore.

  • [ SET ] OWNER TO principal

    Transfers ownership of the share to principal. To run this statement, you must be the owner of the share.

    Applies to: Databricks SQL Databricks Runtime 11.3 LTS and above

    SET is allowed as an optional keyword.

Examples

SQL

-- Creates a share named `some_share`.
> CREATE SHARE some_share;

-- Add a table to the share.
> ALTER SHARE some_share
     ADD TABLE my_schema.my_tab
         COMMENT 'some comment'
         PARTITION(c1_int = 5, c2_date LIKE '2021%')
         AS shared_schema.shared_tab;

-- Add a schema to the share.
> ALTER SHARE some_share
     ADD SCHEMA some_schema
         COMMENT 'some comment';

-- Add a view to the share.
> ALTER SHARE some_share
     ADD VIEW my_schema.my_view
         COMMENT 'some comment'
         AS shared_schema.shared_view;

-- Add a materialized view to the share.
> ALTER SHARE some_share
     ADD MATERIALIZED VIEW my_schema.my_mat_view
         COMMENT 'some comment'
         AS shared_schema.shared_mat_view;

-- Share a table with history
> ALTER SHARE share ADD TABLE table1 WITH HISTORY;
> ALTER SHARE share ADD TABLE table2 WITHOUT HISTORY;
> SHOW ALL IN SHARE share;
  Name    type   ... history_sharing  ...
  ------  ------ ... ----------------
  Table1  TABLE  ... ENABLED          ...
  Table2  TABLE  ... DISABLED         ...

-- Remove the table again
> ALTER SHARE some_share
    REMOVE TABLE shared_schema.shared_tab;

-- Remove the schema again
> ALTER SHARE some_share
    REMOVE SCHEMA some_schema;

-- Remove a view again
> ALTER SHARE some_share
    REMOVE VIEW shared_schema.shared_view;

-- Rename a share
> ALTER SHARE some_share
    RENAME TO new_share;

-- Change ownership of the share
> ALTER SHARE some_share
    OWNER TO `alf@melmak.et`

Related articles

• Change data feed
• CREATE SHARE
• DESCRIBE SHARE
• DESCRIBE HISTORY
• DROP SHARE
• SHOW SHARES
• SHOW ALL IN SHARE
• COMMENT ON SHARE